In vitro/ ex vivo antiplasmodial activity and phytochemical screening of crude extracts entandrophragma angolense (Welw.) C. DC., Griffonia simplicifolia (Vahl ex DC.) Baill .et Uapaca guineensis Müll. Arg. three plants of ivorian pharmacopeia in the treatment of Malaria | In vitro ex vivo antiplasmodial activity and phytochemical screening of crude extracts entandrophragma angolense Welw. C. DC. Griffonia simplicifolia Vahl ex DC. Baill .et Uapaca guineensis Müll. Arg. three plants of ivorian pharmacopeia in the treatment of Malaria